Details for Patent: 7,217,826

Title:	2-oxo-1-pyrrolidine derivatives, process for preparing them and their uses
Abstract:	The invention concerns 2-oxo-1-pyrrolidine derivatives and a process for preparing them and their uses. The invention also concerns a process for preparing .alpha.-ethyl-2-oxo-1-pyrrolidine acetamide derivatives from unsaturated 2-oxo-1-pyrrolidine derivatives. Particularly the invention concerns novel intermediates and their use in methods for the preparation of S-.alpha.-ethyl-2-oxo-1-pyrrolidine acetamide.
Inventor(s):	Surtees; John (Watermael-Boisfort, BE), Marmon; Violeta (Oxfordshire, GB), Differding; Edmond (Ottignies-Louvain-la-Neuve, BE), Zimmermann; Vincent (Lausanne, CH)
Assignee:	UCB Farchim S.A. (Bulle, CH)
Filing Date:	Jan 04, 2005
Application Number:	11/028,039
Claims:	1. Laevorotatory enantiomer of compound of general formula (B) and pharmaceutically acceptable salts thereof, ##STR00019## wherein R.sup.1 is methyl and X is --COOMe. 2. Laevorotatory enantiomer of compound of general formula (B) and pharmaceutically acceptable salts thereof, ##STR00020## wherein R.sup.1 is methyl and X is --COOEt. 3. A process for preparing the Laevorotatory or enantiomer of compound of general formula (B) according to claim 1 and pharmaceutically acceptable salts thereof, ##STR00021## wherein, R.sup.1 is methyl and X is --COOMe, comprising the asymmetric hydrogenation of Z isomer or E isomer of precursor A2 ##STR00022## 4. A process for preparing the Laevorotatory or enantiomer of compound of general formula (B) according to claim 2 and pharmaceutically acceptable salts thereof, ##STR00023## wherein, R.sup.1 is methyl and X is --COOEt, comprising the asymmetric hydrogentation of precursor A2' ##STR00024##